Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual posição Denard Walker joga?
 ###Tabelas: CREATE TABLE rjtv_stations_nationwide_2nd_avenue (rjtv_stations_nationwide_2nd_avenue_id AUTO_INCREMENT PRIMARY KEY, Branding VARCHAR, Callsign VARCHAR, Ch. # VARCHAR, Power (kW) VARCHAR, Station Type VARCHAR, Coverage (Transmitter site) VARCHAR) CREATE TABLE leaders_in_the_northern_ireland_assembely (leaders_in_the_northern_ireland_assembely_id AUTO_INCREMENT PRIMARY KEY, Leader VARCHAR, Party VARCHAR, Leader's Seat VARCHAR, Number of Seats INT, Leader since VARCHAR) CREATE TABLE nfl_draft (nfl_draft_id AUTO_INCREMENT PRIMARY KEY, Pick # INT, NFL Team VARCHAR, Player VARCHAR, Position VARCHAR, College VARCHAR) CREATE TABLE bowling_averages_top_10 (bowling_averages_top_10_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Team VARCHAR, Matches INT, Overs VARCHAR, Wickets INT, Average VARCHAR, Economy VARCHAR, BBI VARCHAR, 4wi INT, 5wi INT) CREATE TABLE growth_personnel (growth_personnel_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Total USAAF INT, Tot Officers INT, Tot Enlisted INT, # overseas INT, Officers o/s INT, Enlisted o/s INT)  
SELECT Position FROM nfl_draft WHERE Player = denard walker